mirror of
https://github.com/scratchfoundation/bgfx.git
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744 lines
16 KiB
C++
744 lines
16 KiB
C++
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// -*- coding: utf-8 -*-
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// Scintilla source code edit control
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/**
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* @file LexModula.cxx
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* @author Dariusz "DKnoto" Knociński
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* @date 2011/02/03
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* @brief Lexer for Modula-2/3 documents.
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*/
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// The License.txt file describes the conditions under which this software may
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// be distributed.
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "PropSetSimple.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "LexerModule.h"
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#ifdef SCI_NAMESPACE
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using namespace Scintilla;
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#endif
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#ifdef DEBUG_LEX_MODULA
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#define DEBUG_STATE( p, c )\
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fprintf( stderr, "Unknown state: currentPos = %ud, char = '%c'\n", p, c );
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#else
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#define DEBUG_STATE( p, c )
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#endif
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static inline bool IsDigitOfBase( unsigned ch, unsigned base ) {
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if( ch < '0' || ch > 'f' ) return false;
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if( base <= 10 ) {
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if( ch >= ( '0' + base ) ) return false;
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} else {
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if( ch > '9' ) {
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unsigned nb = base - 10;
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if( ( ch < 'A' ) || ( ch >= ( 'A' + nb ) ) ) {
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if( ( ch < 'a' ) || ( ch >= ( 'a' + nb ) ) ) {
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return false;
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}
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}
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}
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}
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return true;
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}
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static inline unsigned IsOperator( StyleContext & sc, WordList & op ) {
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int i;
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char s[3];
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s[0] = sc.ch;
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s[1] = sc.chNext;
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s[2] = 0;
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for( i = 0; i < op.Length(); i++ ) {
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if( ( strlen( op.WordAt(i) ) == 2 ) &&
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( s[0] == op.WordAt(i)[0] && s[1] == op.WordAt(i)[1] ) ) {
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return 2;
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}
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}
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s[1] = 0;
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for( i = 0; i < op.Length(); i++ ) {
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if( ( strlen( op.WordAt(i) ) == 1 ) &&
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( s[0] == op.WordAt(i)[0] ) ) {
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return 1;
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}
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}
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return 0;
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}
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static inline bool IsEOL( Accessor &styler, unsigned curPos ) {
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unsigned ch = styler.SafeGetCharAt( curPos );
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if( ( ch == '\r' && styler.SafeGetCharAt( curPos + 1 ) == '\n' ) ||
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( ch == '\n' ) ) {
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return true;
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}
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return false;
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}
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static inline bool checkStatement(
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Accessor &styler,
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int &curPos,
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const char *stt, bool spaceAfter = true ) {
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int len = static_cast<int>(strlen( stt ));
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int i;
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for( i = 0; i < len; i++ ) {
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if( styler.SafeGetCharAt( curPos + i ) != stt[i] ) {
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return false;
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}
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}
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if( spaceAfter ) {
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if( ! isspace( styler.SafeGetCharAt( curPos + i ) ) ) {
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return false;
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}
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}
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curPos += ( len - 1 );
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return true;
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}
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static inline bool checkEndSemicolon(
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Accessor &styler,
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int &curPos, int endPos )
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{
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const char *stt = "END";
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int len = static_cast<int>(strlen( stt ));
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int i;
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for( i = 0; i < len; i++ ) {
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if( styler.SafeGetCharAt( curPos + i ) != stt[i] ) {
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return false;
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}
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}
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while( isspace( styler.SafeGetCharAt( curPos + i ) ) ) {
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i++;
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if( ( curPos + i ) >= endPos ) return false;
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}
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if( styler.SafeGetCharAt( curPos + i ) != ';' ) {
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return false;
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}
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curPos += ( i - 1 );
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return true;
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}
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static inline bool checkKeyIdentOper(
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Accessor &styler,
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int &curPos, int endPos,
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const char *stt, const char etk ) {
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int newPos = curPos;
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if( ! checkStatement( styler, newPos, stt ) )
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return false;
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newPos++;
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if( newPos >= endPos )
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return false;
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if( ! isspace( styler.SafeGetCharAt( newPos ) ) )
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return false;
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newPos++;
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if( newPos >= endPos )
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return false;
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while( isspace( styler.SafeGetCharAt( newPos ) ) ) {
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newPos++;
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if( newPos >= endPos )
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return false;
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}
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if( ! isalpha( styler.SafeGetCharAt( newPos ) ) )
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return false;
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newPos++;
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if( newPos >= endPos )
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return false;
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char ch;
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ch = styler.SafeGetCharAt( newPos );
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while( isalpha( ch ) || isdigit( ch ) || ch == '_' ) {
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newPos++;
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if( newPos >= endPos ) return false;
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ch = styler.SafeGetCharAt( newPos );
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}
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while( isspace( styler.SafeGetCharAt( newPos ) ) ) {
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newPos++;
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if( newPos >= endPos ) return false;
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}
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if( styler.SafeGetCharAt( newPos ) != etk )
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return false;
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curPos = newPos;
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return true;
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}
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static void FoldModulaDoc( unsigned int startPos,
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int length,
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int , WordList *[],
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Accessor &styler)
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{
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int curLine = styler.GetLine(startPos);
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int curLevel = SC_FOLDLEVELBASE;
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int endPos = startPos + length;
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if( curLine > 0 )
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curLevel = styler.LevelAt( curLine - 1 ) >> 16;
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int curPos = startPos;
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int style = styler.StyleAt( curPos );
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int visChars = 0;
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int nextLevel = curLevel;
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while( curPos < endPos ) {
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if( ! isspace( styler.SafeGetCharAt( curPos ) ) ) visChars++;
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switch( style ) {
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case SCE_MODULA_COMMENT:
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if( checkStatement( styler, curPos, "(*" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "*)" ) )
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nextLevel--;
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break;
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case SCE_MODULA_DOXYCOMM:
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if( checkStatement( styler, curPos, "(**", false ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "*)" ) )
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nextLevel--;
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break;
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case SCE_MODULA_KEYWORD:
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if( checkStatement( styler, curPos, "IF" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "BEGIN" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "TRY" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "LOOP" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "FOR" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "WHILE" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "REPEAT" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "UNTIL" ) )
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nextLevel--;
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else
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if( checkStatement( styler, curPos, "WITH" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "CASE" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "TYPECASE" ) )
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nextLevel++;
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else
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if( checkStatement( styler, curPos, "LOCK" ) )
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nextLevel++;
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else
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if( checkKeyIdentOper( styler, curPos, endPos, "PROCEDURE", '(' ) )
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nextLevel++;
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else
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if( checkKeyIdentOper( styler, curPos, endPos, "END", ';' ) ) {
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int cln = curLine;
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int clv_old = curLevel;
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int pos;
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char ch;
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int clv_new;
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while( cln > 0 ) {
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clv_new = styler.LevelAt( cln - 1 ) >> 16;
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if( clv_new < clv_old ) {
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nextLevel--;
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pos = styler.LineStart( cln );
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while( ( ch = styler.SafeGetCharAt( pos ) ) != '\n' ) {
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if( ch == 'P' ) {
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if( styler.StyleAt(pos) == SCE_MODULA_KEYWORD ) {
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if( checkKeyIdentOper( styler, pos, endPos,
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"PROCEDURE", '(' ) ) {
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break;
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}
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}
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}
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pos++;
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}
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clv_old = clv_new;
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}
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cln--;
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}
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}
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else
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if( checkKeyIdentOper( styler, curPos, endPos, "END", '.' ) )
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nextLevel--;
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else
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if( checkEndSemicolon( styler, curPos, endPos ) )
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nextLevel--;
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else {
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while( styler.StyleAt( curPos + 1 ) == SCE_MODULA_KEYWORD )
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curPos++;
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}
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break;
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default:
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break;
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}
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if( IsEOL( styler, curPos ) || ( curPos == endPos - 1 ) ) {
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int efectiveLevel = curLevel | nextLevel << 16;
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if( visChars == 0 )
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efectiveLevel |= SC_FOLDLEVELWHITEFLAG;
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if( curLevel < nextLevel )
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efectiveLevel |= SC_FOLDLEVELHEADERFLAG;
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if( efectiveLevel != styler.LevelAt(curLine) ) {
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styler.SetLevel(curLine, efectiveLevel );
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}
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curLine++;
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curLevel = nextLevel;
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if( IsEOL( styler, curPos ) && ( curPos == endPos - 1 ) ) {
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styler.SetLevel( curLine, ( curLevel | curLevel << 16)
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| SC_FOLDLEVELWHITEFLAG);
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}
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visChars = 0;
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}
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curPos++;
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style = styler.StyleAt( curPos );
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}
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}
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static inline bool skipWhiteSpaces( StyleContext & sc ) {
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while( isspace( sc.ch ) ) {
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sc.SetState( SCE_MODULA_DEFAULT );
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if( sc.More() )
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sc.Forward();
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else
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return false;
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}
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return true;
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}
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static void ColouriseModulaDoc( unsigned int startPos,
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int length,
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int initStyle,
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WordList *wl[],
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Accessor &styler ) {
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WordList& keyWords = *wl[0];
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WordList& reservedWords = *wl[1];
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WordList& operators = *wl[2];
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WordList& pragmaWords = *wl[3];
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WordList& escapeCodes = *wl[4];
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WordList& doxyKeys = *wl[5];
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const int BUFLEN = 128;
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char buf[BUFLEN];
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int i, kl;
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int charPos = 0;
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StyleContext sc( startPos, length, initStyle, styler );
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while( sc.More() ) {
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switch( sc.state ) {
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case SCE_MODULA_DEFAULT:
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if( ! skipWhiteSpaces( sc ) ) break;
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if( sc.ch == '(' && sc.chNext == '*' ) {
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if( sc.GetRelative(2) == '*' ) {
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sc.SetState( SCE_MODULA_DOXYCOMM );
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sc.Forward();
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} else {
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sc.SetState( SCE_MODULA_COMMENT );
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}
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sc.Forward();
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}
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else
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if( isalpha( sc.ch ) ) {
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if( isupper( sc.ch ) && isupper( sc.chNext ) ) {
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for( i = 0; i < BUFLEN - 1; i++ ) {
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buf[i] = sc.GetRelative(i);
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if( !isalpha( buf[i] ) && !(buf[i] == '_') )
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break;
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}
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kl = i;
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buf[kl] = 0;
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if( keyWords.InList( buf ) ) {
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sc.SetState( SCE_MODULA_KEYWORD );
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sc.Forward( kl );
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sc.SetState( SCE_MODULA_DEFAULT );
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continue;
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}
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else
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if( reservedWords.InList( buf ) ) {
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sc.SetState( SCE_MODULA_RESERVED );
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sc.Forward( kl );
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sc.SetState( SCE_MODULA_DEFAULT );
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continue;
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} else {
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/** check procedure identifier */
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}
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} else {
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for( i = 0; i < BUFLEN - 1; i++ ) {
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buf[i] = sc.GetRelative(i);
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if( !isalpha( buf[i] ) &&
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!isdigit( buf[i] ) &&
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!(buf[i] == '_') )
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break;
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}
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kl = i;
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buf[kl] = 0;
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sc.SetState( SCE_MODULA_DEFAULT );
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sc.Forward( kl );
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continue;
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}
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}
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else
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if( isdigit( sc.ch ) ) {
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sc.SetState( SCE_MODULA_NUMBER );
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continue;
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}
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else
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if( sc.ch == '\"' ) {
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sc.SetState( SCE_MODULA_STRING );
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}
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else
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if( sc.ch == '\'' ) {
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charPos = sc.currentPos;
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sc.SetState( SCE_MODULA_CHAR );
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}
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else
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if( sc.ch == '<' && sc.chNext == '*' ) {
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sc.SetState( SCE_MODULA_PRAGMA );
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sc.Forward();
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} else {
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unsigned len = IsOperator( sc, operators );
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if( len > 0 ) {
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sc.SetState( SCE_MODULA_OPERATOR );
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sc.Forward( len );
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sc.SetState( SCE_MODULA_DEFAULT );
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continue;
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} else {
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DEBUG_STATE( sc.currentPos, sc.ch );
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}
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}
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break;
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case SCE_MODULA_COMMENT:
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if( sc.ch == '*' && sc.chNext == ')' ) {
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sc.Forward( 2 );
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sc.SetState( SCE_MODULA_DEFAULT );
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continue;
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}
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break;
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case SCE_MODULA_DOXYCOMM:
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switch( sc.ch ) {
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case '*':
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if( sc.chNext == ')' ) {
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sc.Forward( 2 );
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case '@':
|
||
|
if( islower( sc.chNext ) ) {
|
||
|
for( i = 0; i < BUFLEN - 1; i++ ) {
|
||
|
buf[i] = sc.GetRelative(i+1);
|
||
|
if( isspace( buf[i] ) ) break;
|
||
|
}
|
||
|
buf[i] = 0;
|
||
|
kl = i;
|
||
|
|
||
|
if( doxyKeys.InList( buf ) ) {
|
||
|
sc.SetState( SCE_MODULA_DOXYKEY );
|
||
|
sc.Forward( kl + 1 );
|
||
|
sc.SetState( SCE_MODULA_DOXYCOMM );
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case SCE_MODULA_NUMBER:
|
||
|
{
|
||
|
buf[0] = sc.ch;
|
||
|
for( i = 1; i < BUFLEN - 1; i++ ) {
|
||
|
buf[i] = sc.GetRelative(i);
|
||
|
if( ! isdigit( buf[i] ) )
|
||
|
break;
|
||
|
}
|
||
|
kl = i;
|
||
|
buf[kl] = 0;
|
||
|
|
||
|
switch( sc.GetRelative(kl) ) {
|
||
|
case '_':
|
||
|
{
|
||
|
int base = atoi( buf );
|
||
|
if( base < 2 || base > 16 ) {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
} else {
|
||
|
int imax;
|
||
|
|
||
|
kl++;
|
||
|
for( i = 0; i < BUFLEN - 1; i++ ) {
|
||
|
buf[i] = sc.GetRelative(kl+i);
|
||
|
if( ! IsDigitOfBase( buf[i], 16 ) ) {
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
imax = i;
|
||
|
for( i = 0; i < imax; i++ ) {
|
||
|
if( ! IsDigitOfBase( buf[i], base ) ) {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
kl += imax;
|
||
|
}
|
||
|
sc.SetState( SCE_MODULA_BASENUM );
|
||
|
for( i = 0; i < kl; i++ ) {
|
||
|
sc.Forward();
|
||
|
}
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case '.':
|
||
|
if( sc.GetRelative(kl+1) == '.' ) {
|
||
|
kl--;
|
||
|
for( i = 0; i < kl; i++ ) {
|
||
|
sc.Forward();
|
||
|
}
|
||
|
sc.Forward();
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
} else {
|
||
|
bool doNext = false;
|
||
|
|
||
|
kl++;
|
||
|
|
||
|
buf[0] = sc.GetRelative(kl);
|
||
|
if( isdigit( buf[0] ) ) {
|
||
|
for( i = 0;; i++ ) {
|
||
|
if( !isdigit(sc.GetRelative(kl+i)) )
|
||
|
break;
|
||
|
}
|
||
|
kl += i;
|
||
|
buf[0] = sc.GetRelative(kl);
|
||
|
|
||
|
switch( buf[0] )
|
||
|
{
|
||
|
case 'E':
|
||
|
case 'e':
|
||
|
case 'D':
|
||
|
case 'd':
|
||
|
case 'X':
|
||
|
case 'x':
|
||
|
kl++;
|
||
|
buf[0] = sc.GetRelative(kl);
|
||
|
if( buf[0] == '-' || buf[0] == '+' ) {
|
||
|
kl++;
|
||
|
}
|
||
|
buf[0] = sc.GetRelative(kl);
|
||
|
if( isdigit( buf[0] ) ) {
|
||
|
for( i = 0;; i++ ) {
|
||
|
if( !isdigit(sc.GetRelative(kl+i)) ) {
|
||
|
buf[0] = sc.GetRelative(kl+i);
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
kl += i;
|
||
|
doNext = true;
|
||
|
} else {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
doNext = true;
|
||
|
break;
|
||
|
}
|
||
|
} else {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
}
|
||
|
|
||
|
if( doNext ) {
|
||
|
if( ! isspace( buf[0] ) &&
|
||
|
buf[0] != ')' &&
|
||
|
buf[0] != '>' &&
|
||
|
buf[0] != '<' &&
|
||
|
buf[0] != '=' &&
|
||
|
buf[0] != '#' &&
|
||
|
buf[0] != '+' &&
|
||
|
buf[0] != '-' &&
|
||
|
buf[0] != '*' &&
|
||
|
buf[0] != '/' &&
|
||
|
buf[0] != ',' &&
|
||
|
buf[0] != ';'
|
||
|
) {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
} else {
|
||
|
kl--;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
sc.SetState( SCE_MODULA_FLOAT );
|
||
|
for( i = 0; i < kl; i++ ) {
|
||
|
sc.Forward();
|
||
|
}
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
for( i = 0; i < kl; i++ ) {
|
||
|
sc.Forward();
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case SCE_MODULA_STRING:
|
||
|
if( sc.ch == '\"' ) {
|
||
|
sc.Forward();
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
} else {
|
||
|
if( sc.ch == '\\' ) {
|
||
|
i = 1;
|
||
|
if( IsDigitOfBase( sc.chNext, 8 ) ) {
|
||
|
for( i = 1; i < BUFLEN - 1; i++ ) {
|
||
|
if( ! IsDigitOfBase(sc.GetRelative(i+1), 8 ) )
|
||
|
break;
|
||
|
}
|
||
|
if( i == 3 ) {
|
||
|
sc.SetState( SCE_MODULA_STRSPEC );
|
||
|
} else {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
}
|
||
|
} else {
|
||
|
buf[0] = sc.chNext;
|
||
|
buf[1] = 0;
|
||
|
|
||
|
if( escapeCodes.InList( buf ) ) {
|
||
|
sc.SetState( SCE_MODULA_STRSPEC );
|
||
|
} else {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
}
|
||
|
}
|
||
|
sc.Forward(i+1);
|
||
|
sc.SetState( SCE_MODULA_STRING );
|
||
|
continue;
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case SCE_MODULA_CHAR:
|
||
|
if( sc.ch == '\'' ) {
|
||
|
sc.Forward();
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
}
|
||
|
else
|
||
|
if( ( sc.currentPos - charPos ) == 1 ) {
|
||
|
if( sc.ch == '\\' ) {
|
||
|
i = 1;
|
||
|
if( IsDigitOfBase( sc.chNext, 8 ) ) {
|
||
|
for( i = 1; i < BUFLEN - 1; i++ ) {
|
||
|
if( ! IsDigitOfBase(sc.GetRelative(i+1), 8 ) )
|
||
|
break;
|
||
|
}
|
||
|
if( i == 3 ) {
|
||
|
sc.SetState( SCE_MODULA_CHARSPEC );
|
||
|
} else {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
}
|
||
|
} else {
|
||
|
buf[0] = sc.chNext;
|
||
|
buf[1] = 0;
|
||
|
|
||
|
if( escapeCodes.InList( buf ) ) {
|
||
|
sc.SetState( SCE_MODULA_CHARSPEC );
|
||
|
} else {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
}
|
||
|
}
|
||
|
sc.Forward(i+1);
|
||
|
sc.SetState( SCE_MODULA_CHAR );
|
||
|
continue;
|
||
|
}
|
||
|
} else {
|
||
|
sc.SetState( SCE_MODULA_BADSTR );
|
||
|
sc.Forward();
|
||
|
sc.SetState( SCE_MODULA_CHAR );
|
||
|
continue;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case SCE_MODULA_PRAGMA:
|
||
|
if( sc.ch == '*' && sc.chNext == '>' ) {
|
||
|
sc.Forward();
|
||
|
sc.Forward();
|
||
|
sc.SetState( SCE_MODULA_DEFAULT );
|
||
|
continue;
|
||
|
}
|
||
|
else
|
||
|
if( isupper( sc.ch ) && isupper( sc.chNext ) ) {
|
||
|
buf[0] = sc.ch;
|
||
|
buf[1] = sc.chNext;
|
||
|
for( i = 2; i < BUFLEN - 1; i++ ) {
|
||
|
buf[i] = sc.GetRelative(i);
|
||
|
if( !isupper( buf[i] ) )
|
||
|
break;
|
||
|
}
|
||
|
kl = i;
|
||
|
buf[kl] = 0;
|
||
|
if( pragmaWords.InList( buf ) ) {
|
||
|
sc.SetState( SCE_MODULA_PRGKEY );
|
||
|
sc.Forward( kl );
|
||
|
sc.SetState( SCE_MODULA_PRAGMA );
|
||
|
continue;
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
sc.Forward();
|
||
|
}
|
||
|
sc.Complete();
|
||
|
}
|
||
|
|
||
|
static const char *const modulaWordListDesc[] =
|
||
|
{
|
||
|
"Keywords",
|
||
|
"ReservedKeywords",
|
||
|
"Operators",
|
||
|
"PragmaKeyswords",
|
||
|
"EscapeCodes",
|
||
|
"DoxygeneKeywords",
|
||
|
0
|
||
|
};
|
||
|
|
||
|
LexerModule lmModula( SCLEX_MODULA, ColouriseModulaDoc, "modula", FoldModulaDoc,
|
||
|
modulaWordListDesc);
|